I am using the Pronto direct in RF mode to control X10, and am not using an IR<->X10 converter as this was not needed in Europe (since the Pronto transmits at the right RF frequency; this is only applicable in Europe not in the US due to frequency differences).

With the new firmware upgrade, some of the X10 functionality has been removed i.e. ON/OFF still work OK, but DIM/BRIGHT does not.

I believe that the issue is directly related to the firmward upgrade because:
* Everything worked OK before
* I tried using an older file version created using the last version of the Editor and transferring it to my pronto using the older Editor version - I get the same DIM/BRIGHT problem.

My codes were generated using the CodeGen programme.

The following is the (unsatisfactory) response that I received from Philips today:

Dear Sir,
>
> Thank you for your enquiry.
>
> Please note that the Pronto was not designed to control RF-operated devices. The only RF functionality supported on the Pronto is the communication with the RF extender. We are aware of the fact that the Pronto and X10 RF systems are using the same frequency, and that some degree of control may be achieved because of that. This is considered a lucky workaround, and it was never the purpose of the Pronto design. Therefore we cannot support the direct control of X10 or any other RF-operated devices in any way.
>
> As the new firmware did not change the operating frequency of the RF signals emitted by the Pronto, the hardware or firmware of the Pronto cannot be the cause of control changes. The only possible cause can be the codes used, and these are not created or supported by Philips. I suggest you contact the supplier of the codes or software involved for support on this issue.
>
> Kind regards,
>
> Gerard Feitsma
>
>
> Philips Pronto European helpdesk
>


I accept that they may not directly support X10 functionality, but even if it was a lucky workaround, it did work satisfactorally before, and the new firmware upgrade removed that functionality (one of the main reasons why I, and many other European X10 users, have purchased a Pronto).

Does anybody know how I can revert to the previous firmware version? I have tried using the installer that comes with the previous firmware version but it gives me an error message indicating that I cannot revert to an earlier firmware version.